Grip mechanism for cableways



cf BENDER 2,026,86@

GRIP MECHANISM FOR CABLEWAYS Jam... 7, 1936.

,Filed June 14, 1933 /nvenonfwgjm Patented Jan. 7, 1936 Y STATES lil.

3 Claims.

.MY invention reIetes te improvements in gripy meh?" ff4 "YSQSV Object threofibe: c 'm `the"trat1on ropeiand avoid o, the `grip"'rnenn einem upcmj the tiens and; en @scant or this" feet .ine'diaimeter .2o ,ef thetraetionieiie .el little Smaller @the meenam than the valley.' .It semetimes hee.- pens't at a yy i'ch'eiampstn traction rope tightly in .the Valley .dees het de S 'higher u'p eind' consjedentiy slipping' secure? the rope" ,h eie `2;; b ing thinner'. Ierd'er to 'afvQiewhisimon- `will be automatie me! ment ef .the edeee 'ene .jef the tly the saine t ion mae. `,This rejet, ,i the' sente t Werking efe grip tional mining mechanism liii e, is .hat aeeempliehed .by any any June 17, 1932 0f the knewn dei/ieee 1h ell .of them differeeeee OCCHI beiweeri the veleeiwefthe eer and 'ef' the traction rope attnemqaieiiegrenen-ing, which are unavoidable, so that the'afdcilitiunal clamping will ensue'already'fat moment when any shift- 5 ing moyement'pccurfsiletween tli'eaf'and the rope, so thatth'e clamping farce iS already .0.0.11- sumed at the memnt" when" "i.s`ree11y needed- This incorrect l"clarnjgiing` causes great incon- Venience also in the case when the car after passing a support; runs downf'iipona sloping part of the track -calolejlo'causfethe Vclamping device is compelled to shift out"offor`1 e"v clamping position across the nonclamping central position into the second Clamping position, whereby het .only Le. 15 heavy jerkl iscaused'in' the tractionrope lou'talso there is 'a danser ef lbpng.

The object of this inven on is now to produce e variable grip mech ,Smwhieh een eeeemmodate itself automatically according QL the 20 Variation inthe section ofthe ropland to warf rant a correct .and non-s1.inning eellpling between lthe' grippingv device` and' the rope. This problem has been Solved ,by me by'eembnine tw@ different traction rope grip de'yicesv winch, taken 25 separately, may Valreadylie known.' I use one of the wen known'grip devices eegneinine tw@ .Clemoing jaws movableagainst one another by a spindle and combine this' grip by 'rigid yconnection with a grip device of rspecial construction containing, besides the two usual clamping jaws, an additional clamping mechanism which comes into op.- eration .when a shifting xensues between the grip andthe rope.v These' twdcombined and rigidly connected gripy deyies 'are in such a manner de- 35 pendent on one another that the additional clamping mechanism can leave its ineffectual central Ypositiononly in thatcase when, under the influence of ,the first grip device, the traction rope and the car have gained the same velocity. When the rst grip deyice is'clamping4 the traction rope, the second grip device with the additional clamping mechanism is at rest, and at the same time its additional clamping mechanism under all circumstances, is yin its neutral central position. Thus lI have attained by `this combination that, as soon asany action ensues which raises the clamping force even by the slightest slipping, the eie'c't is that the additional clamp- 50 ing mechanism will he moved automatically and put intoV opera-tion" Vwith vabsolute reliability. Consequently the safety of the' cableway especially for passenger service vis considerably'raised.

Two embodiments ,of the invention are illust5 the clamping jaw 28.

drawing in which:

Fig. 1 is a side view of the whole arrangement, showing the combination and rigid connection of the two grip devices A and B.

Fig. 2 is a detached view of the grip device B with the additional clamping mechanism on an enlarged scale, seen from behind.

Fig. 3 shows a vertical section of the grip device B shown in Fig. 2 according to line Fig. 4 shows a horizontal section of the same according to line y-y in Fig. 2.

Figs. 5 and 6 show a detached view of the usual grip device A of the vice type, Fig. 5 being a vertical section, Fig. 6 is a side view of it.

I and 2 are the two pendant heads each consisting of four trolley sheaves which support the car 4 by means of the carrying yoke 3. 5 is an intermediate suspension tackle between the pendant heads I and 2 and the carrying yoke 3. This suspension tackle 5 also bears the two grip devices A and B which both continually clamp the endless traction rope 6 in the direction of the arrow. The rst rope grip device A, being the foremost in the `circulating direction, is of the usual construction. The second or back clamping device B is provided with an additional clamping mechanism of special construction acting in both directions.

The iirst grip device A, illustrated on an enlarged scale in Figs. 5 and 6, is of usual construction. It contains a spindle 2| rotatably mounted within the forepart of the suspension tackle 5 and this spindle carries at its one end an oscillating lever 24 provided at its upper end with a balance weight in the form of a roller 23. At its other end the spindle 2| is provided with a righthanded single screw thread 25 of a large pitch surrounded by and gearing with the back part of At its middle part the spindle 2| is provided with a left-handed fine pitch thread 26 surrounded by and gearing with the clamping jaw 21. When the whole device is in motion, the roller 23 strikes against a coupling point, the lever 24 is moved thereby rotating the spindle 2| and with it the two clamping jaws 21 and 28, so that these are pressed tightly against and clamp the traction rope 6. The righthanded screw 25, on account of its having only one screw thread and gearing with the jaw 28, causes this jaw to grip the rope 6 very rapidly at the very moment when the spindle 2| begins to turn. After the spindle 2| has turned a certain distance the jaw 28 does not move further in axial direction, the clamping jaw 21 being then moved alone by the iine pitch thread 26 gearing with it, and is pressed with great force against the rope 6. Linings 21 and 28' respectively are inserted within the clamping jaws 21 and 28. As soon as the roller 23 comes into contact with the stationary guiding rails, the spindle 2| is turned in the opposite direction, whereby the two clamping jaws 21 and 28 are opened, so that the rope 6 is uncoupled.

The rear grip device B is shown on an enlarged scale in Figures 2 to 4.` One of its clamping jaws is provided with an additional clamping mechanism whereby it di'ers from the usual grip device A. The movement of its two clamping jaws is caused by the turning of the spindle 8 which is rotatably mounted at the other end or rear part of the suspension tackle 5 in almost the same manner as described with regard to the spindle 2|. Only one jaw 1 of this device is shown, the counter-jaw, being of the usual simple trated by way of example in the accompanying construction, has been omitted in order that the special inner construction of this jaw may be seen. The counter-jaw is applied symmetrically to the axis of the traction rope 6 6, Fig. 4. 1 is the body of the jaw. By turning the spindle 8 it is moved transversely to the axis of the traction rope 6 simultaneously with the counter-jaw not shown, so that both jaws will be drawn together and moved toward or away from one another. 9 is a lining provided with a longitudinal groove Ilgon the one side for the reception of the traction rope 6. On the other side it is provided with several small grooves I4 extending in a zigzag line for the reception of rollers I0. The lining 9 is supported uponv the bottom plate I2, fastened by bolts I5 to the body of the jaw 1, by means of the rollers IIJ rotating in the small grooves I 4 and consequently the lining 9 is movable out of its ineffectual central position, in which it is shown, somewhat to the right or to the left. The springs I3 secure the lining 9 in the middle Vposition shown and at the same time prevent it from falling out. If any slipping occurs, the lining 9, within the jaw 1 will be shifted in the one Vor in the other direction causing the rollers IU to roll upon the flat bottom plate I2 and move up the oblique plane I6 of the small grooves I4, so that the lining 9 will approach the axis of the rope 6, that is, the clamping force is increased.

Instead of the wedge-shaped lining as shown eccentric friction pawls, toggle levers or the like may be used for the same purpose.

I claim: Y 1. A grip mechanism for cableways, compris ing in combination two rigidly interconnected traction rope grip devices the first of said devices in the direction of travel of the cable comprising two clampingjaws and a spindle adapted to move said jaws against one another, and the second device comprising two clamping jaws, a spindle adapted to move said jaws against one another, one of said last mentioned jaws being recessed on its side adjacent the cable, a liner longitudinally movable in said recess, and means in said recess moving said liner towards the cable and gripping the same.

2. A grip mechanism for cableways, comprising in combination two rigidly interconnected traction rope grip devices the first of said devices in the direction of travel of the cable comprising two clamping jaws and a spindle adapted to move said jaws against one another, and the second device comprising two clamping jaws, a spindle adapted to move said jaws against one another, one of said last mentioned jaws being recessed on its side adjacent the cable, a liner longitudinally movable in said recess, said liner having inclined surfaces on its side remote from the cable, and said recessed jaw having a plane surface at the bottom of said recess, and a plurality of rollers between said liner and the bottom of the recess in said recessed jaw adapted to roll on said plane surface and said inclined surfaces to move said liner towards the cable.

3. A grip mechanism for cableways, comprising in combination two rigidly interconnected traction rope grip devices the first of said devices in the direction of travel of the cable comprising two clamping jaws and a spindle adapted to move said jaws against one another, and the second device comprising two clamping jaws, a, spindle adapted to move said jaws against one another, one of said last mentioned jaws being recessed on its side adjacent the cable, a liner longitudinally movable in said recess, said liner surfaces to move said liner towards the cable, and two springs xed on said recessed jaw and bearing one against each end of said liner tending to maintain said liner in its middle inoperative position.

CARL BENDER. 

